EP0762403B1 - Appareil de disque optique et tête optique pour celui-ci - Google Patents
Appareil de disque optique et tête optique pour celui-ci Download PDFInfo
- Publication number
- EP0762403B1 EP0762403B1 EP96306505A EP96306505A EP0762403B1 EP 0762403 B1 EP0762403 B1 EP 0762403B1 EP 96306505 A EP96306505 A EP 96306505A EP 96306505 A EP96306505 A EP 96306505A EP 0762403 B1 EP0762403 B1 EP 0762403B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- disk
- type
- optical
- thickness
- collimator lens
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1392—Means for controlling the beam wavefront, e.g. for correction of aberration
- G11B7/13925—Means for controlling the beam wavefront, e.g. for correction of aberration active, e.g. controlled by electrical or mechanical means
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/02—Control of operating function, e.g. switching from recording to reproducing
- G11B19/12—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1372—Lenses
- G11B7/1376—Collimator lenses
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1372—Lenses
- G11B7/1378—Separate aberration correction lenses; Cylindrical lenses to generate astigmatism; Beam expanders
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B2007/0003—Recording, reproducing or erasing systems characterised by the structure or type of the carrier
- G11B2007/0006—Recording, reproducing or erasing systems characterised by the structure or type of the carrier adapted for scanning different types of carrier, e.g. CD & DVD
Definitions
- the present invention relates to an optical disk apparatus and optical head thereof in which disk plates of different thickness from the side in the face of the optical head to the information recording surface (hereinafter, the thickness) such as high density recording or play back disks and Compact Discs (CD) may be played back and/or recorded.
- the thickness such as high density recording or play back disks and Compact Discs (CD)
- optical disk apparatus of the prior art in which one single apparatus being capable of playing back or reading/writing disks having different thickness is disclosed in the Japanese Patent Laid-Open Hei 4-95224, which apparatus is used for converging laser light beam into an optical disk recording layer without the need of interchanging objective lens for each respective of disk plates having different thicknesses.
- JP-A-07182690 discloses an optical disk apparatus for playing back from and/or recording onto the recording surface of disks of different thickness.
- a conversion lens is inserted or removed between the collimator lens and the objective lens.
- JP-A-07065409 discloses an optical disk apparatus on which a convex lens is inserted between the collimator and objective lenses for disks thicker than on predetermined value, and a concave lens is inserted for disks thinner than the predetermined valve.
- JP-A-63-234418 discloses an apparatus in which light can be focussed on different layers of a disk with a plurality of recording layers.
- the light source is mounted on a n electrostructive element, and the application of a field to that element causes it to expand and contract thereby varying the spacing of the light source and the collimator lens.
- US-A-5157555 discloses an apparatus which corrects for variations in the nominal thickness of the overcoating substrate layer of the disk. It varies the gap between two lens elements of a corrector lens, located between the collimator and objective lenses, thereby correcting the additional spherical aberration due to the changes in substrate thickness.
- US-A-5281797 discloses an apparatus to allow recording onto short or long wavelength optical disks. It proposes that the aperture diameter is varied, with a variation in the light source output.
- an optical disk apparatus for playing back from and/or recording onto a recording surface two types of disks, the first type of disk having a thickness of 0.6 mm and the second type of disk having a thickness of 1.2 mm; and the apparatus including an optical head having a collimator lens for collimating incident light rays into collimated light rays, and an objective lens which receives the collimated light rays from the collimator lens and further comprising:
- an optical head for use in an optical disk apparatus for playing back from and/or recording onto two types of disks, the first type of disk having a thickness of 0.6 mm and the second type of disk having a thickness of 1.2 mm; and the optical head having a collimator lens for collimating rays of incident light from a light source more nearly parallel, and an objective lens for receiving collimated rays of more nearly parallel light from the collimator lens;
- the disks having different thicknesses may be written or read out with only one single objective lens.
- the present invention has an effect in that the moving parts of the actuator may become less complex and may be composed in a simpler way.
- the disks are of two types of thickness.
- Fig. 1 shows a schematic diagram showing the arrangement of an optical disk apparatus and the optical head thereof in accordance with first to sixth embodiment of the present invention.
- the reference numeral 6a designates a disk composed of two 0.6 mm plates adhered (for high density recording or playing back), 6b designates to a 1.2 mm single disk plate (CD).
- Fig. 1B the collimator lens 2 is moved to the left side by a distance S, from the position as shown in Fig. 1A.
- the light emitted from the collimator lens 2 passes through the aperture 7 as divergent light into the objective lens 5, to converge into the disk recording surface 8b with aberration well corrected.
- the arrangement as shown in Fig. 2 is similar to that of Fig. 1 and comprises further the aperture 4, which is removed out of the light path in the Fig. 2A and inserted to the light path in the Fig. 2B to perform as an aperture for determining the image side NA.
- Other functionalities are identical to Fig. 1.
- Exemplary values according to this method as the seventh embodiment may be as follows:
- the wave aberration in Fig. 2B may be 0.009 ⁇ rms.
- disk plates have been assumed to have two distinct thicknesses. However for recording or playing back on the disk plate of three or more different thicknesses, another optical element having negative focal distance may be provided, or another optical element having positive focal distance may be provided, or the collimator lens is to be moved.
- only one objective lens may be effectively used for well correcting aberration even with disk thickness being changed. Furthermore, the correction of aberration may be well performed even when the objective lens is decentering due to the tracking servo.
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
- Lenses (AREA)
Claims (5)
- Dispositif à disque optique pour lire à partir d'une surface d'enregistrement de deux types de disques et/ou enregistrer sur celle-ci, le premier type de disque ayant une épaisseur de 0,6 mm et le deuxième type de disque ayant une épaisseur de 1,2 mm ; et le dispositif comprenant une tête optique comportant une lentille formant collimateur (2) pour collimater des rayons de lumière incidente en rayons de lumière collimatée, et une lentille d'objectif (5) qui reçoit les rayons de lumière collimatée à partir de la lentille formant collimateur, et comprenant de plus :un discriminateur de disque pour identifier des disques de types différents, comprenant au moins un premier type de disque avec une première épaisseur et un deuxième type de disque avec une deuxième épaisseur ;un dispositif de commande connecté au discriminateur de disque ;le dispositif de commande est configuré de façon à effectuer une sélection au moins entre :(1) une première configuration optique avec une première distance entre la lentille formant collimateur (2) et une source de lumière (1), et(2) une deuxième configuration optique avec une deuxième distance entre la lentille formant collimateur (2) et une source de lumière (1).
- Dispositif à disque optique selon la revendication 1, comprenant de plus :des moyens d'ouverture (4, 7) pour sélectionner une ouverture numérique de la lentille d'objectif en fonction du discriminateur de disque de telle sorte que l'ouverture numérique soit plus grande pour le premier type de disque et plus petite pour le deuxième type de disque.
- Dispositif à disque optique selon la revendication 2, comprenant de plus :des moyens pour changer une ouverture numérique de la lentille d'objectif, les moyens de changement d'ouverture numérique sélectionnant une ouverture numérique de la lentille d'objectif en réponse à l'identification de disque venant du discriminateur de disque.
- Tête optique destinée à être utilisée dans un dispositif à disque optique pour lire à partir de deux types de disques et/ou enregistrer sur ceux-ci, le premier type de disque ayant une épaisseur de 0,6 mm et le deuxième type de disque ayant une épaisseur de 1,2 mm ; et la tête optique comportant une lentille formant collimateur (2) pour collimater des rayons de lumière incidente à partir d'une source de lumière de façon plus quasi-parallèle, et une lentille d'objectif (5) pour recevoir des rayons collimatés de lumière plus quasi-parallèle à partir de la lentille formant collimateur (2) ;
caractérisée en ce que :la tête optique comprend de plus des moyens pour sélectionner une distance entre la lentille formant collimateur (2) et une source de lumière (1) au moins entre une première distance pour lire sur le premier type de disque et/ou'enregistrer sur celui-ci et une deuxième distance pour lire à partir du deuxième type de disque et/ou enregistrer sur celui-ci. - Tête optique selon la revendication 4, dans laquelle la lentille d'objectif (5) comporte une ouverture numérique latérale d'image (7) qui est établie dé façon à être plus grande pour la lecture et/ou l'enregistrement sur le premier type de disque que sur le deuxième type de disque.
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23426895 | 1995-09-12 | ||
JP234268/95 | 1995-09-12 | ||
JP23426895 | 1995-09-12 | ||
JP31997895 | 1995-12-08 | ||
JP319978/95 | 1995-12-08 | ||
JP31997895 | 1995-12-08 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0762403A2 EP0762403A2 (fr) | 1997-03-12 |
EP0762403A3 EP0762403A3 (fr) | 1997-07-02 |
EP0762403B1 true EP0762403B1 (fr) | 2003-12-03 |
Family
ID=26531464
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96306505A Expired - Lifetime EP0762403B1 (fr) | 1995-09-12 | 1996-09-06 | Appareil de disque optique et tête optique pour celui-ci |
Country Status (4)
Country | Link |
---|---|
US (2) | US5699341A (fr) |
EP (1) | EP0762403B1 (fr) |
KR (1) | KR100239237B1 (fr) |
DE (1) | DE69630930T2 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107632487A (zh) * | 2013-04-20 | 2018-01-26 | 深圳市绎立锐光科技开发有限公司 | 发光装置及相关光源*** |
Families Citing this family (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2995003B2 (ja) * | 1995-05-08 | 1999-12-27 | 三洋電機株式会社 | 光学式再生装置 |
KR100239237B1 (ko) * | 1995-09-12 | 2000-01-15 | 가나이 쓰도무 | 광디스크장치 및 그의 광헤드 |
US5966362A (en) * | 1995-11-02 | 1999-10-12 | Konica Corporation | Optical system for recording and reproducing for use in optical information recording medium |
JPH09243805A (ja) * | 1996-03-13 | 1997-09-19 | Sony Corp | レンズ設計方法 |
DE19611904A1 (de) * | 1996-03-26 | 1997-10-02 | Thomson Brandt Gmbh | Gerät zum Lesen und/oder Beschreiben optischer Aufzeichnungsträger |
JPH1011786A (ja) * | 1996-06-21 | 1998-01-16 | Pioneer Electron Corp | 情報記録媒体の再生用ピックアップ装置 |
JP3378154B2 (ja) * | 1996-07-16 | 2003-02-17 | シャープ株式会社 | 光学式記録再生装置 |
US6051471A (en) * | 1996-09-03 | 2000-04-18 | Advanced Micro Devices, Inc. | Method for making asymmetrical N-channel and symmetrical P-channel devices |
JP3033693B2 (ja) * | 1996-09-13 | 2000-04-17 | 日本電気株式会社 | 光ヘッド装置 |
JPH10134400A (ja) * | 1996-10-28 | 1998-05-22 | Nec Corp | 光ヘッド装置 |
JP3787925B2 (ja) * | 1996-11-14 | 2006-06-21 | ソニー株式会社 | 対物レンズ装置及び記録再生装置 |
DE69716219T2 (de) | 1996-11-20 | 2003-04-17 | Matsushita Electric Industrial Co., Ltd. | Objektivlinse und optischer Kopf und damit versehenes optisches Plattengerät |
EP0874359B1 (fr) * | 1997-04-21 | 2009-01-07 | Konica Corporation | Appareil de lecture optique |
JPH10312575A (ja) * | 1997-05-09 | 1998-11-24 | Pioneer Electron Corp | 光ピックアップ装置 |
US6285645B1 (en) * | 1997-05-27 | 2001-09-04 | Asahi Glass Company Ltd. | Optical device |
JPH10334575A (ja) * | 1997-06-04 | 1998-12-18 | Nec Corp | 光学的情報記録装置 |
US5963532A (en) * | 1998-01-21 | 1999-10-05 | Terastor Corporation | Polarization rotation and phase compensation in near-field electro-optical system |
US6097691A (en) * | 1997-09-05 | 2000-08-01 | Asahi Glass Company Ltd. | Optical device for recording or reading data to an optical disk |
JP2002515624A (ja) * | 1998-05-13 | 2002-05-28 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 記録担体を光学的に走査する装置 |
JP2000019388A (ja) * | 1998-06-30 | 2000-01-21 | Sony Corp | 色収差補正用光学素子およびこれを具備する光学ピックアップ装置、ならびにこの光学ピックアップ装置を具備する光再生装置および光記録再生装置 |
EP0984440A3 (fr) | 1998-09-04 | 2000-05-24 | Matsushita Electric Industrial Co., Ltd. | Système de détection d'aberration et appareil d'enregistrement et de reproduction d'information optique |
JP2002533860A (ja) * | 1998-12-21 | 2002-10-08 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 光走査装置 |
JP2000338395A (ja) * | 1999-05-27 | 2000-12-08 | Konica Corp | 光ピックアップ装置及び補正レンズ |
KR100741552B1 (ko) | 1999-07-28 | 2007-07-20 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | 광학 주사장치 |
US6159782A (en) * | 1999-08-05 | 2000-12-12 | Advanced Micro Devices, Inc. | Fabrication of field effect transistors having dual gates with gate dielectrics of high dielectric constant |
KR100644566B1 (ko) * | 1999-09-29 | 2006-11-13 | 삼성전자주식회사 | 고밀도 광집속을 위한 대물렌즈 및 이를 채용한 광픽업장치 |
JP2001236674A (ja) * | 2000-02-21 | 2001-08-31 | Pioneer Electronic Corp | 光学式ピックアップ装置 |
EP1313095B1 (fr) * | 2001-11-15 | 2008-10-15 | Samsung Electronics Co. Ltd. | Tête de lecture optique compatible |
WO2003063150A1 (fr) | 2002-01-23 | 2003-07-31 | Matsushita Electric Industrial Co., Ltd. | Unite de disque optique |
US7443778B2 (en) * | 2003-02-27 | 2008-10-28 | Matsushita Electric Industrial Co., Ltd. | Optical head device and optical information device using the same, computer, optical disk player, car navigation system, optical disk recorder, and optical disk server |
US20050201248A1 (en) * | 2004-03-10 | 2005-09-15 | Junichi Kitabayashi | Optical pickup apparatus and an optical disc drive apparatus equipped with such an optical pickup |
US10416436B2 (en) * | 2016-04-11 | 2019-09-17 | Dante Duby | Advancements in reflective monocular, binocular, and night vision applications including multi-wave |
Family Cites Families (18)
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---|---|---|---|---|
US4797545A (en) * | 1985-09-10 | 1989-01-10 | Mitsubishi Denki Kabushiki Kaisha | Optical head device having positionally adjustable parts |
KR900003686B1 (ko) * | 1985-11-27 | 1990-05-30 | 마쯔시다덴기산교 가부시기가이샤 | 광학기록 재생장치 |
JPS62158318A (ja) * | 1985-12-28 | 1987-07-14 | Canon Inc | 流れ制御装置 |
JPS63234418A (ja) * | 1987-03-23 | 1988-09-29 | Fujitsu Ltd | 多層光磁気デイスク装置 |
JPH0831850B2 (ja) * | 1987-07-08 | 1996-03-27 | 株式会社日立製作所 | フレ−ム同期クロツク作成回路 |
JPH01105338A (ja) * | 1987-07-14 | 1989-04-21 | Mitsubishi Electric Corp | 光記録再生装置 |
CA2047606C (fr) * | 1990-07-24 | 1996-08-13 | Michiyoshi Nagashima | Methode et appareil de lecture de disques optiques |
US5235581A (en) * | 1990-08-09 | 1993-08-10 | Matsushita Electric Industrial Co., Ltd. | Optical recording/reproducing apparatus for optical disks with various disk substrate thicknesses |
JPH0777031B2 (ja) * | 1991-10-16 | 1995-08-16 | インターナショナル・ビジネス・マシーンズ・コーポレイション | 収差補償装置 |
US5157555A (en) * | 1991-12-04 | 1992-10-20 | General Electric Company | Apparatus for adjustable correction of spherical aberration |
US5281797A (en) * | 1991-12-26 | 1994-01-25 | Hitachi, Ltd. | Short wavelength optical disk head having a changeable aperture |
JPH0620298A (ja) * | 1992-06-30 | 1994-01-28 | Sony Corp | 光ヘツドの開口絞りの大きさを調整する方法とその装置 |
JP2532818B2 (ja) * | 1993-02-01 | 1996-09-11 | 松下電器産業株式会社 | 対物レンズおよび光ヘッド装置 |
JPH0765409A (ja) * | 1993-08-20 | 1995-03-10 | Ricoh Co Ltd | 光情報記録再生装置 |
JPH07182690A (ja) * | 1993-12-21 | 1995-07-21 | Matsushita Electric Ind Co Ltd | 光記録再生装置 |
JPH08203094A (ja) * | 1995-01-26 | 1996-08-09 | Matsushita Electric Ind Co Ltd | 光学システム |
US5526338A (en) * | 1995-03-10 | 1996-06-11 | Yeda Research & Development Co. Ltd. | Method and apparatus for storage and retrieval with multilayer optical disks |
KR100239237B1 (ko) * | 1995-09-12 | 2000-01-15 | 가나이 쓰도무 | 광디스크장치 및 그의 광헤드 |
-
1996
- 1996-08-30 KR KR1019960036659A patent/KR100239237B1/ko not_active IP Right Cessation
- 1996-09-06 EP EP96306505A patent/EP0762403B1/fr not_active Expired - Lifetime
- 1996-09-06 DE DE69630930T patent/DE69630930T2/de not_active Expired - Fee Related
- 1996-09-11 US US08/711,466 patent/US5699341A/en not_active Expired - Fee Related
-
1997
- 1997-08-28 US US08/919,469 patent/US5872761A/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107632487A (zh) * | 2013-04-20 | 2018-01-26 | 深圳市绎立锐光科技开发有限公司 | 发光装置及相关光源*** |
CN107632487B (zh) * | 2013-04-20 | 2020-03-24 | 深圳光峰科技股份有限公司 | 发光装置及相关光源*** |
Also Published As
Publication number | Publication date |
---|---|
DE69630930T2 (de) | 2004-12-23 |
DE69630930D1 (de) | 2004-01-15 |
US5872761A (en) | 1999-02-16 |
US5699341A (en) | 1997-12-16 |
EP0762403A3 (fr) | 1997-07-02 |
KR100239237B1 (ko) | 2000-01-15 |
EP0762403A2 (fr) | 1997-03-12 |
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